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SipHeader.cpp
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144 lines (129 loc) · 3.38 KB
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/*
* Copyright (C) 2012 Yee Young Han <websearch@naver.com> (http://blog.naver.com/websearch)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "SipParserDefine.h"
#include "SipHeader.h"
#include "MemoryDebug.h"
CSipHeader::CSipHeader()
{
}
CSipHeader::~CSipHeader()
{
}
/**
* @ingroup SipParser
* @brief SIP 헤더 문자열을 파싱하여 CSipHeader 클래스의 멤버 변수에 저장한다.
* @param pszText SIP 헤더의 값을 저장한 문자열
* @param iTextLen pszText 문자열의 길이
* @returns 성공하면 파싱한 길이를 리턴하고 그렇지 않으면 -1 를 리턴한다.
*/
int CSipHeader::Parse( const char * pszText, int iTextLen )
{
Clear();
if( pszText == NULL || iTextLen <= 0 ) return -1;
int iPos, iValuePos;
char cType = 0;
// parse header name & skip prefix space of header value
for( iPos = 0; iPos < iTextLen; ++iPos )
{
if( cType == 0 )
{
if( pszText[iPos] == ':' || pszText[iPos] == ' ' || pszText[iPos] == '\t' )
{
m_strName.append( pszText, iPos );
++cType;
}
else if( pszText[iPos] == '\r' )
{
if( iPos + 1 >= iTextLen || pszText[iPos+1] != '\n' ) return -1;
return iPos + 2;
}
}
else if( pszText[iPos] == ':' || pszText[iPos] == ' ' || pszText[iPos] == '\t' )
{
continue;
}
else
{
break;
}
}
iValuePos = iPos;
// parse header value
for( ; iPos < iTextLen; ++iPos )
{
if( cType == 10 )
{
if( pszText[iPos] != ' ' && pszText[iPos] != '\t' )
{
cType = 11;
--iPos;
iValuePos = iPos;
}
}
else if( pszText[iPos] == '\r' )
{
if( iValuePos != -1 )
{
m_strValue.append( pszText + iValuePos, iPos - iValuePos );
iValuePos = -1;
}
++iPos;
if( iPos == iTextLen || pszText[iPos] != '\n' ) return -1;
++iPos;
if( iPos == iTextLen ) break;
if( pszText[iPos] == ' ' || pszText[iPos] == '\t' )
{
cType = 10;
m_strValue.append( " " );
}
else
{
break;
}
}
}
return iPos;
}
/**
* @ingroup SipParser
* @brief SIP 메시지에 포함된 문자열을 작성한다.
* @param pszText SIP 헤더의 값을 저장할 문자열 변수
* @param iTextSize pszText 변수의 크기
* @returns 성공하면 작성한 문자열 길이를 리턴하고 그렇지 않으면 -1 를 리턴한다.
*/
int CSipHeader::ToString( char * pszText, int iTextSize )
{
if( pszText == NULL || iTextSize <= 0 ) return -1;
if( m_strValue.empty() )
{
return snprintf( pszText, iTextSize, "%s: \r\n", m_strName.c_str() );
}
else
{
return snprintf( pszText, iTextSize, "%s: %s\r\n", m_strName.c_str(), m_strValue.c_str() );
}
}
/**
* @ingroup SipParser
* @brief 멤버 변수를 초기화시킨다.
*/
void CSipHeader::Clear()
{
m_strName.clear();
m_strValue.clear();
}